Apply fixed or percentage discounts to completed orders, per line item, via Shopify's Order Editing API. Use a saved default rule or override per item. Whether rewarding loyal customers, correcting billing mistakes, or providing goodwill discounts, Retro Discount makes the process simple, accurate, and fully traceable. Every discount is logged with a full audit trail in the built-in history view.

• Apply discounts to completed orders without issuing refunds
• Per-item discount control — set different amounts per line item
• Choose percentage or fixed dollar discounts per item
• Saves a default discount rule to pre-fill every order automatically
• Full discount history with audit trail, notes, and order links